package main

import "fmt"

const bj = "Beijing"

func main() {
	const sz = "shenzhen"
	//bj = "BeiJing" 不能再次赋值 编译报错
	//sz = "SZ" 不能再次赋值 编译报错

	fmt.Println("bj -", bj)
	fmt.Println("sz -", sz)

}
